Arduino Pro mini is very nice small size, with Arduino Bluetooth Wireless Serial Port Module to put head set is under going project.

also put all this to OLED HMD head pad is under going project.

to see video, 3D brain wave interactive OpenCL animation is nice to use this.

http://www.psychiclab.net/Movie/IBVAopenCL1.html

3D model for OLED HMD head pad brain wave interface.

2 ch amplifier, Arduino Pro mini + bluetooth, Battery. shows 5 electrode model.

image : head set 3D model 

photo : head set construction process

two active amp is inside of headset.

all other parts : Arduino, Battery & DC-DC, filter & amp is HMD head pad part.

connect via 8 P cable : +-12V, GND, two balanced output from two active amp.

HMD head set construction process photo

after made it, let you know.

  prototype  prototype 1  prototype 2  prototype 3    code        diagram